RFC-9591 FROST implemented as a libsecp256k1 extension (C89)

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Hi HN, We built a FROST (RFC-9591) threshold Schnorr signature implementation as an extension module for libsecp256k1. The goal wasn’t to make another framework but to see what it looks like when FROST is engineered inside a minimal, production-grade C crypto library. Highlights: - fork of bitcoin-core/secp256k1 - portable C89 - no external crypto dependencies - RFC test vector compatibility - upstream merges maintained Mostly useful for embedded or performance-sensitive systems where adding a full crypto stack isn’t ideal. Code: https://github.com/bancaditalia/secp256k1-frost Happy to answer questions or hear critiques.

Visit product View on Hacker NewsFeb 26, 2026

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